If both universal and non-universal new physics WCs are present then the universal couplings will generate new physics effects in \(b \rightarrow s \tau ^+ \tau ^-\)  decay with WCs in \(\mu \)  and \(\tau \)  sectors being the same. Therefore it is interesting to see what impact the universal coupling determined by \(b \rightarrow s\, \mu ^+\,\mu ^-\)  data will have on observables in decays induced by the quark level transition \(b \rightarrow s \tau ^+ \tau ^-\) .
In this work we study this implication for several \(CP\) -conserving observables in \(B \rightarrow K^* \tau ^+ \tau ^-\)  A few examples of correlating current B anomalies with new physics in \(b \rightarrow s \tau ^+ \tau ^-\)  in specific model dependent scenarios can be seen in [1]}, [2]}, [3]}, [4]}.. Apart from analysing the branching ratio, the \(K^*\)  polarization fraction, the \(\tau \)  forward-backward asymmetry and optimized angular observables in \(B \rightarrow K^* \tau ^+ \tau ^-\)  decay, we also consider \(\tau - \mu \)  lepton flavor differences (\(Q^{\tau \mu }\) ) and ratios (\(R^{\tau \mu }\) ) of these observables.
